I believe Eos only exempts the Intensity parameter from marking. When a fixture has a secondary intensity parameter (like a Mechanical Shutter, Main Intensity, or Intens 2), Eos treats it as a Non-Intensity Parameter (NIP) and marks it.
Proposed Solution:
Add a "Mark" or "Exclude from Mark" column directly in the Fixture Profile Editor
By default, parameters follow standard Eos logic. Users can change a parameter's cell to {Disable}. The marking system will then completely ignore that parameter, treating it exactly like main Intensity.